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公开(公告)号：US20200295839A1
公开(公告)日：2020-09-17
申请号：US16778916
申请日：2020-01-31
Applicant: RAYTHEON COMPANY
Inventor： Andrew Kowalevicz , Benjamin P. Dolgin , Gary M. Graceffo
IPC: H04B10/556 , H04B10/516 , H04L27/20
Abstract: Optical transmitters configured to modulate optical signals with a path-dependent phase modulation scheme. In certain examples, an optical transmitter includes an optical source that emits a carrier waveform, a modulator configured to modulate the carrier waveform according to a path-dependent phase modulation scheme to produce a modulated optical signal, a mapping module configured to map a data payload to the path-dependent phase modulation scheme, each symbol in the path-dependent phase modulation scheme including a concatenation of at least one location bit and a path bit, the at least one location bit identifying an amount of a phase transition in the modulated optical signal and the path bit identifying a direction of the phase transition, and a pulse-shaping filter configured to control the modulator, based on an output from the mapping module, to impose the path-dependent phase modulation scheme on the carrier waveform to generate the modulated optical signal.
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公开(公告)号：US10714251B2
公开(公告)日：2020-07-14
申请号：US15963519
申请日：2018-04-26
Applicant: RAYTHEON COMPANY
Inventor： Benjamin P. Dolgin , Thomas Lavedas , Joseph J. Fraundorfer
Abstract: Antenna structures including two anti-symmetrically wound transformers to compensate for stray radiation. In one example an antenna structure includes a transformer assembly connected between an antenna and first and second balanced signal contacts, the transformer assembly including first and second transformer cores independently positionable in space relative to one another, a pair of primary windings connected to the antenna in parallel with one another, and a pair of balanced secondary windings connected in parallel with one another between the first and second balanced signal contacts.
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公开(公告)号：US10686533B2
公开(公告)日：2020-06-16
申请号：US16367567
申请日：2019-03-28
Applicant: RAYTHEON COMPANY
Inventor： Benjamin P. Dolgin , Gary M. Graceffo , Andrew Kowalevicz
Abstract: Optical receivers and methods for balanced signal detection using an optical resonator. In one example, an optical receiver includes an optical resonator that receives an optical signal, accumulates resonant optical signal energy, and emits first output optical signal energy from a first output and second output optical signal energy from the second output. In response to a modulation of the optical signal, the optical resonator is configured to disrupt the first and second output optical signal energies to convert the modulation of the optical signal into an intensity modulation of the first and second output optical signal energies. The optical receiver includes a first detector that receives the first output optical signal energy and detects the intensity modulation of the first output optical signal energy, and a second detector that receives the second output optical signal energy and detects the intensity modulation of the second output optical signal energy.
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公开(公告)号：US20190319715A1
公开(公告)日：2019-10-17
申请号：US16380269
申请日：2019-04-10
Applicant: RAYTHEON COMPANY
Inventor： Andrew Kowalevicz , Gary M. Graceffo , Benjamin P. Dolgin
IPC: H04B10/67
Abstract: Photo-resonator optical detectors and optical receiver systems incorporating same, In one example, an optically resonant detector includes a housing having an optical window, a photodetector disposed within the housing, and an optical resonator disposed in optical alignment with the photodetector within the housing and positioned between the optical window and the photodetector, the optical resonator being configured to receive an input optical signal via the optical window and to provide an output optical signal to the photodetector.
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公开(公告)号：US20190305855A1
公开(公告)日：2019-10-03
申请号：US16367567
申请日：2019-03-28
Applicant: RAYTHEON COMPANY
Inventor： Benjamin P. Dolgin , Gary M. Graceffo , Andrew Kowalevicz
Abstract: Optical receivers and methods for balanced signal detection using an optical resonator. In one example, an optical receiver includes an optical resonator that receives an optical signal, accumulates resonant optical signal energy, and emits first output optical signal energy from a first output and second output optical signal energy from the second output. In response to a modulation of the optical signal, the optical resonator is configured to disrupt the first and second output optical signal energies to convert the modulation of the optical signal into an intensity modulation of the first and second output optical signal energies. The optical receiver includes a first detector that receives the first output optical signal energy and detects the intensity modulation of the first output optical signal energy, and a second detector that receives the second output optical signal energy and detects the intensity modulation of the second output optical signal energy.
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Patent Agency Ranking
46.发明申请公开(公告)号：US20190305853A1
公开(公告)日：2019-10-03
申请号：US16367574
申请日：2019-03-28
Applicant: RAYTHEON COMPANY
Inventor： Benjamin P. Dolgin , Gary M. Graceffo , Andrew Kowalevicz
IPC: H04B10/61 , H04B10/11 , H04B10/54 , H04B10/071 , G02F1/09
Abstract: Optical receivers and methods for balanced signal detection using an optical resonator. An example of an optical receiver includes a polarizing beamsplitter that receives a free-space optical signal, a first detector positioned to receive the free-space optical signal with the first polarization, an alignment system configured to rotate either the optical receiver about the optical axis or a polarization of the free-space optical signal, a faraday rotator configured to rotate the polarization of the free-space optical signal, an optical resonator that receives the free-space optical signal from the faraday rotator and accumulates resonant optical signal energy, the optical resonator configured to transmit first output optical signal energy and reject second output optical signal energy, the optical resonator being configured to convert a modulation of the free-space optical signal into an intensity modulation of the first and second output optical signal energies, a second detector that receives the first output optical signal energy and detects the intensity modulation of the first output optical signal energy, and a third detector that receives the second output optical signal energy.
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公开(公告)号：US10378880B2
公开(公告)日：2019-08-13
申请号：US15963759
申请日：2018-04-26
Applicant: RAYTHEON COMPANY
Inventor： Benjamin P. Dolgin , Andrew Kowalevicz , Gary M. Graceffo
IPC: G01B11/06
Abstract: Methods and apparatus for measuring thickness and related properties of transparent objects, such as glass. In one example a measurement system includes a light source that produces a collimated optical beam, a modulator that modulates the collimated optical beam to produce a collimated modulated optical beam, optics configured to direct the collimated modulated optical beam to illuminate the transparent test object, and a detector sub-system that receives an intensity-modulated optical beam output from the test object and measures variations in intensity of the intensity-modulated optical beam corresponding to an intensity modulation of the intensity-modulated optical beam, the intensity-modulated optical beam being derived from interaction of the collimated modulated input optical beam with the transparent test object, the detector sub-system being further configured to produce a representation of the thickness and/or related properties of the test object based on the measured variations in intensity of the intensity-modulated optical beam.
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48.发明申请公开(公告)号：US20190195973A1
公开(公告)日：2019-06-27
申请号：US15851620
申请日：2017-12-21
Applicant: RAYTHEON COMPANY
Inventor： Benjamin P. Dolgin , Thomas Lavedas , Joseph J. Fraundorfer
CPC classification number: G01R33/441 , G01R33/445 , G01R33/446 , G01R33/4608 , G01R33/4616
Abstract: A system and method for detecting a nucleus of interest in a chemical using a nuclear quadrupole resonance transition. An excitation pulse is used to excite one or more nuclei of interest, if they present in a sample, to an excited state, the energy of which depends on the magnetic field in the sample. The magnetic field in the sample is modulated, after the end of the excitation pulse, while the nuclei of interest decay from the excited state, so that the radiation they emit is frequency modulated. The frequency modulation is detected in the emitted radiation. In some embodiments a DC magnetic field is applied to the sample, during the application of the excitation pulse, to tune the frequency of the transition being excited.
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公开(公告)号：US10313022B2
公开(公告)日：2019-06-04
申请号：US15717670
申请日：2017-09-27
Applicant: RAYTHEON COMPANY
Inventor： Benjamin P. Dolgin , Gary M. Graceffo , Andrew Kowalevicz
Abstract: Aspects are generally directed to receivers and methods for actively demodulating optical signals. In one example, a receiver includes an optical resonator to receive an optical signal, the optical resonator including an active optical medium interposed between first and second semi-reflective surfaces, where the active optical medium is configured to accumulate resonant optical signal energy inside the optical resonator based on the received optical signal, the second semi-reflective surface is positioned to emit output optical signal energy, and the optical resonator is configured to disturb the output optical signal energy in response to a variation in the received optical signal. The receiver may further include a detector configured to detect the disturbance in the output optical signal energy, and a pump source coupled to the active optical medium to excite the active optical medium to generate an optical gain in the received optical signal.
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50.发明授权公开(公告)号：US10305602B2
公开(公告)日：2019-05-28
申请号：US15816047
申请日：2017-11-17
Applicant: RAYTHEON COMPANY
Inventor： Benjamin P. Dolgin , Andrew Kowalevicz , Gary M. Graceffo
IPC: H04B10/61 , G02B6/293 , H04B10/67 , H04B10/516 , G02B17/00
Abstract: Optical signal receivers and methods are provided that include multiple optical resonators, each of which receives a portion of an arriving optical signal. Various of the optical resonators are tuned or detuned from a carrier wavelength, and produce an intensity modulated output signal in response to modulation transitions in the arriving optical signal. A detector determines modulation transitions in the arriving optical signal by analyzing the intensity modulation output signals from the optical resonators.
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